Title: Repair and Strengthening of Bridges and other Structure
1Repair and Strengthening of Bridges and other
Structures
2Examples of Repair Methods
- Masonry structures Pinning for arch ring
separation, concrete fill of spandrel walls,
crack injection, etc. - Concrete structures Surface protection,
protection of steel reinforcement, etc. - Steel structures repair of corrosion, cracks,
distortion, etc. - Wrought and cast iron stiffening, stitching,
etc.
3Masonry structures
Nagasaki Meganebashi (Japan)
Pont du Gard (France)
Royal Border Rail Bridge (UK)
4Masonry pinning
5Tying of longitudinal cracks in arch ring
6Mass concrete/ reinforced earth fill of spandrel
walls
7Grouted fill of spandrel walls
8Crack injection system
9Epoxy Injection
10Typical hand-applied concrete repairs
11Application of fluid concrete to a beam element
12Plan on column to be repaired
13Strengthening Methods
- Steel plate bonding
- External post-tensioning
- Composite plate bonding
- FRP (CFRP) wraps
14Typical plate bonding application
15Shear stress distribution in a steel plated RC
beam
16Peeling failure of a plated RC beam
17Strengthening of RC slab with steel plates
18Providing continuity in plates
19Working platform and support system for plate
bonding
20Alternative plate bonding solutions
21Example of strengthening with external
post-tensioning (1)
22Example of strengthening with external
post-tensioning (2)
23Example of strengthening with external
post-tensioning (3)
24Examples post-tensioning of trusses
25Example of FRP application on a RC beam
26Comparison of stress-strain characteristics of
steel and carbon
27Fiber-reinforced Polymer (FRP) Composites
28Advantages of FRP
29Role of FRP in Rehabilitation
30FRP Strengthening Methods
31FRP Strengthening Methods (1)
32FRP Strengthening Methods (2)
33(No Transcript)
34Mode of failure of beams
35Example of FRP application on a RC column
36Application methods of FRP wraps to columns
Wrapping of fabric
Winding of strips
Use of composite cables/strips
Bonding of prefabricated shells
Automated winding
Resin infusion
37Installation of laminates to the soffit of RC
bridge decks
38Wrapping of a CFRP fabric to a circular column
39Applying FRP strip on RC beam
40CFRP shear reinforcement